#a = 10
#print(a)
#a = 10.2
#print(type(a))
#a ="abcdef"
#print(len(a))
# a = 10
# print(f"a = {a}")
# print( 4 ** 2)
#
a = 10
b = 20
print(a,b)
a,b =b,a
print(a,b)